Document bazrNB0nV0LGExXJDJQV8vvrZ
ENVIRONMENTAL EMISSIONS PVC
401-3EM-80-0127-001
Determination of Potential Personnel Exposuj to Respirable and Total PVC Particulates Collected at Polymer Science Building, T. R, Evans Research Center, Concord, Ohio April - July, 1980
OCC 10026
DOCUMENT LOCATOR SHEET - ARCHIVES Department of Safety Assessment
D-430O-A
Date
9/19/80
^^nN>IS1oIS cSSIHIAETEETDISWDITEHSIAGNSETDUDTYO
PROVIDE THE LOCATION AND SHALL ACCOMPANY
OF ALL RAW DATA, DOCUMENTATION ALL FINAL REPORTS.
AND
SPECIMENS
cument No,:
401 - 3EM "80 " 0127 "001
Date
Page i
I f
1
-l-1--......
Document Title;
Determination of potential personnel exposures to respirable and total PVC
particulates collected at Polymer Science Building, T.R. Evans Research Center,
Concord, Ohio
April - July, 1980.
Compound No.;
DS
-
AuthOr(s)
G. J. Manning Notebook Reference(s): (Number and Page(s))
No. 10927
Blinded Compound No,;
Location; (Building and Room No.)
Lab B _ Concord Woods
^Aditional Documents: (e.g., Necropsy Sheets, Body Wgt. Records, Chromatograms,
^^^nspondence, etc.)
_^
^
JHP
PVC DUST SAMPLES - 4/16/80: 11205-19-
t^l5-l (respirable)1^ 4/15-8 (total)1/ 4/15-2 (respirable)
Location: (Building and Room No.)
Archives, Life Science Research Buildinq
4/15-9 (total) ,^4/15-10 (total) 4/15-3 (respirable) --
4/17/80: 11205-19-4/15-5 (respirable)") 4/15-11 (total),"
4/.15-4 (respirable! d/1 5-1 2 M-.ot-.al) f 4/15-14 1 total)
5/12/80: 11205-19-4/15-7 ifrespirable) , 4/15-19(totalT, 4/15-18(respirable), 4/15-20(total),-4/15-16(respirabJ e) , 4/15-6(respirable) i/
7/1/80: 11205-19-6/26-2 (respirable)", 6/26-6 (total)^ 6/26-4 (respirable) ,-'6/26-7 (total) p 6/26-3 (respirable)
Specimens;
No Samples retained or stored.
Location; (Building and Room No.)
^_______________________________________________________________________________________________
of Principle Investigator
NaTM of Study Director
G* J* Manning
qCC 10027
11/79 Distribution:
White-SA Archives Canary-QA Unit Files Pink-Author Unit Files Goidenrod-Project Coordinator Unit Files
%
DEPARTMENT OF SAFETY ASSESSMENT ENVIRONMENTAL SCIENCES UNIT
REPORT DOCUMENT NUMBER: 401-3EM-80-0127-001
DETERMINATION OF POTENTIAL PERSONNEL EXPOSURES TO RESPIRABLE AND TOTAL PVC PARTICULATES COLLECTED AT POLYMER SCIENCE BUILDING, T. R. EVANS RESEARCH CENTER, CONCORD, OHIO APRIL - JULY, 1980
OCC 10028
i REPORT
DETERMINATION OF POTENTIAL PERSONNEL EXPOSURES TO RESPIRABLE AND TOTAL PVC PARTICULATES COLLECTED AT POLYMER SCIENCE BUILDING, T. R. EVANS RESEARCH CENTER, CONCORD, OHIO APRIL - 3ULY, 1980
DOCUMENT NUMBER: 401-3EM-80-0127-001
Diamond Shamrock Corporation Department of Safety Assessment Environmental Sciences Unit T, R. Evans Research Center P. 0. Box 348 Painesville, Ohio 44077
Gregory 3. Manning,^RpJsearch Engineer Environmental Sciences Unit
Don E. Stallard, Manager Environmental Sciences Unit
Q'-$-
/ 3. A. Ign^ftoski, Ph. D. /'Director Department of Safety Assessment
7/s/eo
Date
f/f/cf# Date
Date OCC 10029
REPORT
DISTRIBUTION
DOCUMENT NUMBER: 401-3EM-80-0127-001
Original Safety Assessment Archives/B. 3. Szollosi
Copies Industrial Hygienst/E. 3. Baier (1) K. L. Brenis (2) D. A. Cocco (3) QA Files/B. L. Haley (4) Corp. Med. Director/D. W. Hillman (5) M. Labovitz (6) G. 3. Manning (7) Vice President & Director H.E.A.D./R. W. McBurney (8) W. P. McCoy (9) ES Unit Files/D. E. Stallard (10) C. L. Sturm (11)
OCC 10030
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il
TABLE OF CONTENTS
PAGE
TITLE PAGE............................................................................................................................
i
TABLE OF CONTENTS......................................................................................................................ii
LIST OF TABLES.......................................................................................................................... iii
INTRODUCTION ....................................................................................................................
1
CONDUCT OF STUDY .............................................................................................................
6
SUPPORTIVE DATA AND DOCUMENTATION .................................................................. SAMPLE IDENTIFICATION ...............................................................................................
6 6
ANALYTICAL METHODS ......................................................................................................
7
RESULTS........................................................................................................................................... 11
DISCUSSION.................................................................................................................................... 14 APPENDIX............................................................................................................................................16
Document Number: 401-3EM-80-0127-001
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iii
LIST OF TABLES
TABLE 1
2
3 4 5
PAGE
RESPIRABLE PVC DUST SAMPLES COLLECTED AT POLYMER SCIENCE BUILDING - APRIL 16 - 3ULY 1, 1980 ....
2
TOTAL PVC DUST SAMPLES COLLECTED AT POLYMER SCIENCE BUILDING - APRIL 16 - 3UNE 26, 1980 ....
4
SUMMARY OF ANALYTICAL RESULTS ..........................................................
8
SUMMARY OF RESPIRABLE PVC DUST RESULTS.....................................12 SUMMARY OF TOTAL PVC DUST RESULTS............................................ 13
Document Number: 401-3EM-80-0127-001
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INTRODUCTION
The Polymer Science Division of Diamond Shamrock Corporation expressed concern for the potential personnel exposures to respirable PVC dust during a variety of operating conditions. Recent studies conducted in England have shown that PVC dust may have some effect on the respiratory system. OSHA currently categorizes PVC dust as an "Inert or Nusiance Dust," with an 8-hour time-weighted average (TWA) permissable exposure level (PEL) of 5 mg/m of air for respirable dust and 15 mg/m for total dust. Personnel and area type samples were collected at the Polymer Science Building, T. R. Evans Research Center, Diamond Shamrock Corpo ration from April 16 through Duly 1, 1980.
The sample collection descriptions for eleven (11) respirable PVC dust samples are summarized in TABLE 1. The sample collection descriptions for eleven (11) total PVC dust samples are summarized in TABLE 2.
Document Number: 401-3EM-80-0127-001
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TABLE 1
RESPIRABLE PVC DUST SAMPLES COLLECTED AT POLYMER SCIENCE BUILDING APRIL 16 - JULY 1, 1980
Name or Area (Sample No.)
Date
Time On Off
Flow Rate (1pm)
Initial
Final
Comments
Granville E. Taylor (11205-19-4/15-1)
4/16/80
0935
1130
1.8
Hubert N. Alexander (11205-19-4/15-2)
Gerold G. Popely (11205-19-4/15-3)
^eryl I. Clark (11205-19-4/15-4)
4/16/80 4/16/80 4/17/80
0943
1135
1023
1429
0953
1055
1.8 1.8 1.8
Gregory I. Gebean (11205-19-4/15-5)
4/17/80
1027
1131
Office Area (11205-19-4/15-6)
Dust Collector (11205-19-4/15-7)
5/12/80 5/12/80
0952
1605
0936
1552
1.8 1.8 1.8
Mixing Deck (11205-19-4/15-18)
5/12/80
0920
1455
1.8
N.R.: Not Recorded
Document Number: 401-3EM-80-0127-001
N.R.
Dumping resin at coolers. Pappenmeir cooler - 14 cycles, approx. 320 lb. Littleford cooler - 2 cycles.
N.R.
Pappenmeir mixer and cooler
N.R.
Extrusion processing area - NRM extruder
N.R.
Paste Resin Lab - mixed 5 dif ferent lots of PVC paste resin. (Type 753 - Lot N0s. 1417, 1370, 8985, 8971, 1359)
N.R.
Paste Resin Lab Storage Area filled 40 lb. "fiber paks" from 50 lb. PVC dispersion resin bag.
1.75
Coffee area, approx. 2 ft. above floor
1.75
Removes dust from Littleford cooler and the Pappenmeir mixer directly under collector between fan and sox collector, approx. 3 ft. above floor
1.75
Six 50 lb. bags of resin poured into mixer and stabilizer added (Pipe compound, Notebook No. 10080-109-4)
OCC 10034
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% Tablei 1 (cont.)
-3-
Name or Area (Sample No.)
Date
Background-Outside Area
(11205-19-6/26-2)
7/01/80
Warehouse (11205-19-6/26-3)
7/01/80
John T. Beahon 11205-19-6/26-4)
7/01/80
Time On Off
Flow Rate (1pm)
Initial
Final
Comments
0925
1539
0901
1548
0934
1543
1.8
1.75
Rear of building on bench
1.8 1.8 Area approx. 20 ft. from Pappenmeir and Littleford mixers, approx. 5 ft. above floor
1.8 1.7 Small mixing area - Welex mixer; resin weighed into 20 lb. bag
Document Number: 4-01-3EM-80-0127-001
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TABLE 2
TOTAL PVC DUST SAMPLES COLLECTED AT POLYMER SCIENCE BUILDING APRIL 16 - JUNE 26, 1980
Name or Area (Sample No*)
Date
Time On Off
Flow Rate (Ipm)
Initial
Final
Comments
Granville E. Taylor (11205-19-4/15-8)
4/16/80
0938
1133
1.8
N.R.
"Low flow" indication on DuPont
pump. Dumping resin at coolers.
Pappenmeir cooler - 14 cycles
approx. 320 lb. Littleford cooler
- 2 cycles.
Hubert N. Alexander (11205-19-4/15-9)
Gerold G, Popely (11205-19-4/15-10)
A
Cheryl I. Clark (11205-19-4/15-11)
4/16/80 4/16/80 4/17/80
0948
1137
1022
1428
0954
1056
1.8 1.8 1.8
Gregory I. Gebean (11205-19-4/15-12)
4/17/80
1031
1132
Warehouse Area (11205-19-4/15-14)
4/17/80
0921
1545
1.8 1.8
Office Area (11205-19-4/15-15)
4/17/80
0924
1547
1.8
Dust Collector (11205-19-4/15-19)
5/12/80
0938
1554
1.8
N.R.: Not Recorded
Docunent Number: 401-3EM-80-0127-001
N.R.
Pappenmeir mixer and cooler
N.R.
Extrusion processing area - NRM extruder
N.R.
Paste Resin Lab - mixed 5 dif ferent lots of PVC paste resin. (Type 753 - Lot Nos. 1417, 1370, 8985, 8971, 1359)
N.R.
Paste Resin Lab Storage Area filled 40 lb. "fiber paks" from 50 lb. PVC dispersion resin bag.
N.R.
Ground floor of warehouse, approx. 25 ft. from Pappenmeir mixer, approx. 5 ft. above floor on top of resin bags.
N.R.
Coffee area, approx. 2 ft. above floor
1.8 Removes dust from Littleford cooler and the Pappenmeir mixer directly under collector between fan and sox collector, approx. 3 ft. above floor
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Table 2 (cont.)
Name or Area (Sample No.)
Mixing Deck (11205-19-4/15-20)
Date 5/12/80
Background-Outside Area
(11205-19-6/26-6)
7/01/80
3ohn T. Beahon (11205-19-6/26-7)
7/01/80
Time On Off
Flow Rate (1pm)
Initial
Final
Comments
0923
1455
0923
1541
0933
1545
1.8
1.65
Six 50 lb. bags of resin poured
into mixer and stabilizer added
(Pipe compound, Notebook No.
10080-109-4)
1.8
1.75
Rear of building on bench
1.8 1.8 Small mixing area - Welex mixeri resin weighed into 20 lb. bag
Document Number 401-3EM-80-0127-001
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CONDUCT OF STUDY
Six (6) personal and five (5) area respirable PVC dust samples, and six (6) personal and five (5) area total PVC dust samples were collected as described in TABLE 1 and TABLE 2 by K. A. Thompson, Chemist, Environ mental Sciences Unit, Department of Safety Assessment, Diamond Shamrock Corporation. The analyses were conducted from April 14, 1980 through Duly 23, 1980 at the Physical Sciences Building, T. R. Evans Research Center, Diamond Shamrock Corporation, 7528 Auburn Road, Painesville, Ohio and the Concord Woods Laboratories, 11211 Spear Road, Painesville, Ohio 44077. K. A. Thompson performed the analyses.
SUPPORTIVE DATA AND DOCUMENTATION
Data and documentation supportive to this study are contained in Diamond Shamrock Research Notebook 10927, and in the Department of Safety Assess ment Archives, Life Sciences Research Building, T. R. Evans Research Center, Diamond Shamrock Corporation.
SAMPLE IDENTIFICATION
Samples were identified by the Environmental Sciences Unit sample refer ence numbers:
11205-19-4/15-1 11205-19-4/15-2 11205-19-4/15-3 11205-19-4/15-4 11205-19-4/15-5 11205-19-4/15-6 11205-19-4/15-7 11205-19-4/15-8 11205-19-4/15-9
11205-19-4/15-10 11205-19-4/15-11 11205-19-4/15-12
11205-19-4/15-13 11205-19-4/15-14 11205-19-4/15-15 11205-19-4/15-18 11205-19-4/15-19 11205-19-4/15-20
11205-19-4/15-22 11205-19-6/26-1 11205-19-6/26-2 11205-19-6/26-3 11205-19-6/26-4 11205-19-6/26-5 11205-19-6/26-6 11205-19-6/26-7
Document Number: 401-3EM-80-0127-001
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ANALYTICAL METHODS
The samples were collected and analyzed for particulate weight using procedures specified by the "National Institute for Occupational Safety and Health (NIOSH) Manual of Sampling Data Sheets," 1977 Ed., Method 29.02. The method is included in the APPENDIX of this report.
The method consists of collecting particulates in the worker's breathing zone to determine the TWA exposure to total or respirable dust. Total dust samples were collected on 5 urn pore size PVC filters, which have been preweighted to the nearest 0.01 mg. Respirable dust samples were collected on the same type of filters, after passing through a 10 mm nylon cyclone to drop out particulates larger than approximately 10 urn, when collected at a sampling rate of 1.7 1pm. The DuPont P-4000, con stant flow, sampling pumps were calibrated using a Magnehelic flow rate meter, which had been calibrated with a bubble tube.
The sampling pump collection flow rates were inadvertently calibrated at 1.8 liters per minute (1pm) instead of the recommended 1.7 1pm for the respirable dust and 1.5 1pm for the total dust samples. The assumption that this deviation should have no significant effect on these results was confirmed in a September 3, 1980 telephone conversion with David Taylor, Chief of Inorganic Methods Development Section, Measurement Research Branch, Division of Physical Sciences and Engineering, NIOSH, Cincinnati, Ohio.
The analytical results are sumarized in TABLE 3.
Document Number: 401-3EM-80-0127-001
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TABLE 3 SUMMARY OF ANALYTICAL RESULTS
Name or Area (Sample No.)
Respirable & Total Particulates (mg)
Gross
Net
Granville E. Taylor (11205-19-4/15-1)
Hubert E. Alexander (11205-19-4/15-2)
Gerald G. Popely (11205-19-4/15-3)
Cheryl I. Clark (11205-19-4/15-4)
Gregory I. Gebeau (11205-19-4/15-5)
Office Area (11205-19-4/15-6)
Dust Collector (11205-19-4/15-7)
Granville E. Taylor (11205-19-4/15-8)
Hubert E. Alexander (11205-19-4/15-9)
Gerald G. Popely (11205-19-4/15-10)
Cheryl I. Clark (11205-19-4/15-11)
0.111 0.106 1.095 0.052 -0.061 0.011 0.008 1.206 1.241 9.421 0.040
0.105A 0.100A 1.089A 0.046A -0.067A -0.005 -0.008 1.200A 1.235A 9.415A 0.034A
A Blank Filter No. 11205-19-4/15-22 used for weight correction.
B Blank Filter No. 11205-19-4/15-13 used for weight correction.
C Blank Filter Nos. 11205-19-6/26-1 and 11205-19-6/26-5 averaged and used for weight correction.
Document Number: 401-3LM-80-0127-001
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Table 3 (cont.)
Name or Area (Sample No.)
Respirable & Total Particulates (mg)
Gross
Net
Gregory I. Gebeau (11205-19-4/15-12)
Blank (11205-19-4/15-13)
Warehouse Area (11205-19-4/15-14)
Office Area (11205-19-4/15-15) ,,
Mixing Deck Area (11205-19-4/15-18)
Dust Collector (11205-19-4/15-19)
Mixing Deck Area (11205-19-4/15-20)
Blank (11205-19-4/15-22)
Blank (11205-19-6/26-1)
Background-Outside Area (11205-19-6/26-2)
Warehouse Area (11205-19-6/26-3)
0.089 0.016 0.270 0.084 0.221 0.101 1.450 0.006 -0.08 0.13 0.48
0.083A __ B
0.264A 0.078A 0.205B 0.0858 1.434B
_A C
0.19C 0.54C
Blank Filter No. 11205-19-4/15-22 used for weight correction.
Blank Filter No. 11205-19-4/15-13 used for weight correction.
Blank Filter Nos. 11205-19-6/26-1 and 11205-19-6/26-5 averaged and used for weight correction.
Document Number: 401-3EM-80-0127-001
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Table 3 (cont.)
Name or Area (Sample No.)
Respirable & Total Particulates (mg)
Gross
Net
Bohn T. Beahon (11205-19-6/26-4)
Blank (11205-19-6/26-5)
Background-Outside Area (11205-19-6/26-6)
John T. Beahon (11205-19-6/26-7)
0.08 -0.04
0.06 0.52
0.14C _C
0.12C 0.58C
Blank Filter No. 11205-19-4/15-22 used for weight correction.
Blank Filter No. 11205-19-4/15-13 used for weight correction.
C Blank Filter Nos. 11205-19-6/26-1 and 11205-19-6/26-5 averaged and used for weight correction.
Document Number: 401-3EM-80-0127-U01
OCC 10042
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RESULTS
The results from the respirable and total PVC dust samples are given in TABLE 5 and 6, respectively. The OSHA PEL concentrations are given below and are specified as 8-hour TWA concentrations.
Respirable Dust: Total Dust:
3 5 mg/m 15 mg/m^
Document Number: 401-3EH-80-0127-001
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TABLE 4 SUMMARY OF RESPIRABLE PVC DUST RESULTS
Name or Area (SamDle No.1
1 Avg. Flow Rate (lDm)
Collection Time Pd. (min.)
Sample Volume
(m3)
Respirable Particulate Concentration
(ma/m3)
Granville E. Taylor (11205-19-4/15-1)
1.8
115 0.207
0.507
Hubert E. Alexander (11205-19-4/15-2)
1.8
112 0.202
0.496
Gerald G. Popely (11205-19-4/15-3)
1.8
246 0.443
2.46
Cheryl I. Clark (11205-19-4/15-4)
1.8
62 0.112
0.412
Gregory I. Gebeau (11205-19-4/15-5)
Office Area (11205-19-4/15-6)
1.8 1.78
64 0.115 <0.087 373 0.662 <0.015
Dust Collector (11205-19-4/15-7)
1.78
376 0.667 <0.015
Mixing Deck Area (11205-19-4/15-18)
1.78
335 0.595
0.345
Background-Outside Area (11205-19-6/26-2)
1.78
374 0.664
0.286
Warehouse Area (11205-19-6/26-3)
1.8
407
0.733
0.737
Oohn T. Beahon (11205-19-6/26-4)
1.75
369 0.646
0.217
1 Initial and final flow rates were averaged; if the final was not recorded
it was assumed to be constant.
Document Number: 401-3EM-80-0127-001
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TABLE 5 SUMMARY OF TOTAL PVC DUST RESULTS
Name or Area (Sample No.)
1 Avg. Flow Rate (lnm)
Collection Time Pd. (min.)
Sample Volume
(m3)
Total Particulate Concentration
(mq/m )
Granville E. Taylor (11205-19-4/15-8)
1.8
115 0.207
5.80
Hubert E. Alexander (11205-19-4/15-9)
Gerald G. Popely (11205-19-4/15-10)
1.8
109 0.196
6.29
1.8 246 0.443 21.3
Cheryl I. Clark (11205-19-4/15-11)
Gregory I. Gebeau (11205-19-4/15-12)
Office Area (11205-19-4/15-15)
1.8
62 0.112
0.305
1.8
61 0.110
0.756
1.8
383 0.689
0.113
Dust Collector (11205-19-4/15-19)
1.8
376 0.677
0.126
Mixing Deck Area (11205-19-4/15-20)
1.73
332 0.573
2.50
Background-Outside Area (11205-19-6/26-6)
1.78
378 0.671
0.179
Warehouse Area (11205-19-4/15-14)
1.8
384 0.691
0.382
Oohn T. Beahon (11205-19-6/26-7)
1.8
372 0.670
0.866
1 Initial and final flow rates were averaged; if the final was not recorded it was assumed to be constant.
Document Number: 401-3EH-80-0127-001
OCC 10045
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DISCUSSION
All of the respirable PVC dust sample results were below the OSHA PEL of 5 mg/m^. Ten of the samples were less than 15% of the PEL and one sample (G. G. Popely, No. 11205-19-4/15-3) was less than 50% of the PEL.
One of the total PVC dust sample results (G. G. Popely, No. 11205-194/15-10) had a TWA concentration of 21.3 mg/mwhich exceeded the OSHA
3 8-hour PEL of 15 mg/m . All of the remaining samples were less than 45% of the PEL.
Two points should be noted with respect to these samples. First, the sample collections were generally stopped at the end of a particular operation. More specifically, none of these samples actually span a full 8 hours (480 min.). Thus, if the collection had continued during a less dusty operation for the remainder of the 8-hour period, the resulting TWA concentration would be lower than these reported values.
Secondly, the method used here to determine the "respirable" particulate concentration is only an index of the truly respirable fraction of the total particulate concentration. This method, NI0SH Sampling Data Sheet #29.02, achieves a preseparation of the larger particles using a 10 mm nylon cyclone prior to the collection of the measured "respirable" par ticulates on a 5 urn pore size PVC filter.
Approximately half of the particles actually retained in the lungs are less than 0.5 urn in diameter and less than 0.2% of the total number will be larger than 5 urn in diameter.*
* "The Industrial Environment - Its Evaluation and Control," U.S. Depart ment of H.E.W., Public Health Service, Center for Disease Control, Na tional Institute for Occupational Safety and Health, 1973, page 496.
clf/wpc/0:11.14 RF:090880
Document Number: 401-3EM-80-0127-001
OCC 10046
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DIAMOND SHAMROCK CORPORATION DEPARTMENT OF SAFETY ASSESSMENT
QUALITY ASSURANCE STATEMENT
Based on review of the final report, it is concluded that this report accurately reflects the data for "Determination of Potential Personnel Exposures to Respirable and Total PVC Particulates Collected at Polymer Science Building, T. R. Evans Research Center, Concord, Ohio April duly, 1980," Document Number 401-3EM-80-0127-001.
Reviewed by: T5
Assurance Specialist
Document Number: A01-3EM-80-0127-001
OCC 10047
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-16APPENDIX
Document Number: 401-3EM-80-0127-001
OCC 10048
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Sampling Data Sheet April 23, 1975
if 29.02 Class D
Substance :
Inert or Nuisance Dust
Standard :
8-hour time-weighted average for respirable dust: 5 mg/m~> 3
S-hour time-weighted average for total dust: 15 mg/m
Reference: 29 CFR 1910.93
Analytical Method:
The amount of material on a filter is determined by filter weight gain. Before sampling,the filter is pre-weighed to the nearest 0.01 mg. After sampling, the filter is reweighed. The difference in the filters weight is assumed to be the mass of material collected.
Sampling Equipment:
Pump:
A calibrated personal sampling pump whose flow can be determined to an accuracy of + 5%. The pump must have been calibrated with a representative filter and filter holder in line. If the respirable dust concentration is being measured, the pump must have a pulsation dampener and be certified under 30 CFR 74.
Filter Holder: 2 or 3-piece,37-mm filter holder held together by tape or shrinking band.
Filter: 37-mm diameter, 5.0 micrometer pore size polyvinyl chloride filter or equivalent that has been pre-weighed to the nearest 0.01 mg. These filters must be hydrophobic. The filter should be supported with a back-up pad.
Cyclone: 10-mm nylon cyclone. When the respirable dust concentration is measured, it is used with a 2-piece filter holder.
Sampling Head Assembly: This assembly must hold the filter holder, cyclone^ and coupler together rigidly so that air enters only at the cyclone inlet.
Sample Size :
A minimum sampling period of 60 minutes is recommended and longer periods up to eight hours are preferable. If the respirable dust concentration is being measured, a flow rate of 1.7 liters per minute must be used. To determine total dust concentration, use a flow rate of 1.5 liters per minute.
23-1 Document Number: 401-3EM-80-0127-001
OCC 10049
Report Data Sheet #29.02
-18-
Sarapling Procedure:
1. Assemble the filter and three-piece filter cassette and close firmly to insure that the center ring seals the edge of the filter. Examine the holder for a good filter seal. If the cassette will not seal tightly, it should be discarded. If respirable dust is being measured, the center ring is not included in the filter holder. The filter cassette should be held together by a shrinking band or tape.
2. If total nuisance dust is being sampled, remove the filter holder plugs. Attach the filter holder to the sampling pump with a 1/4 inch diameter;3-foot piece of tubing and an adaptor. The adaptor is used to provide a tight connection between the filter holder and tubing.
3. If the respirable dust is being sampled, assemble the two-piece filter holder, coupler, cyclonejand sampling head. The sampling head rigidly holds together the cyclone, and filter holder. The outlet of the sampling head is connected to the pump by a 3-foot piece of 1/4 inch flexible tubing.
4. Clip the cassette or cyclone assembly to- the worker's lapel.
5. Turn the pump on and begin sample collection. The pump flow rate should be checked periodically and readjusted if necessary.
6. Terminate sampling after the predetermined time and note sample flow rate, collection time,and ambient temperature and pressure. If a pressure reading is unavailable, record the elevation.
7. Collected sample cassette should be firmly sealed with the plugs in both the inlet and outlet.
3. With each batch of samples, submit one filter subjected to exactly the same handling as for the samples except that no air is drawn through it. Label these as blanks.
Special Considerations ;
1. Filter holders molded from cellulose-acetate-butyratejwhich is commonly known as Tenite plastic,have been shown to cause blank filter weight gains and must not be used.
2. The alignment of the filter holder and cyclone in the sampling head must be checked. If these parts are not aligned properly, leakage can result.
Before use, the cyclones grit cap or vortex finder should be removed and the interior of the cyclone should be inspected. If the inside of the cyclone is visibly scored, this cyclone should be discarded since the dust separation characteristics of the cyclone might be altered. If It is dirty, the interior of the cyclone should be cleaned before use. This will prevent the reentrainment of this dirt.
29-2 Document Number: 401-3EM-80-0127-001
OCC 10050
Report
Data Sheet //29.02
-19-
Shipping :
After samplingtthe samples and the blank should be shipped in a suitable container designed to prevent damage in transit.
Reference:
"Sampling and Evaluating Respirable Coal Mine Dust", US Bureau of Mines, Pittsburgh, Pa. Information Circular 8503, February, 1971, p. 47.
29-3 Document Number: 401-3EM-80-0127-001
OCC 10051